I like the idea of Dirigible, I have 2 suggestion for you:
1. Can you make diribiles working like trains with custom path? Take for example cargo mod where you draw a line in the water with signals to automate delivery. Similar doing to this.
2. Since Dirigible flies at high altitude, can you make them imune to bitters? (with a settings on/off of course)
3. Also, can you make dirigible dropping bombs? that would be sick.
4. A special dirigible that the only purpose is to light an area, and patroling certain paths or even a radar dirigible.

1. Well, it's similar to https://mods.factorio.com/mod/aai-programmable-vehicles or you want another simplified method?
2. ... Not really...
3. Look at https://mods.factorio.com/mod/adamo-blimp
4. ... ha... you surprised me, it's quite an inspirational idea.

Thanks for your reply, for me AAI Programmable vehicles I never managed to control like I wanted with source - destination, time to wait and such. Giving a possibility to draw 'lines' with stations would be more easy imo.